Storage bin for a riding lawnmower



FIG. 1 is a right rear perspective view of a storage bin for a riding lawnmower showing our new design;

FIG. 2 is an additional right rear perspective view thereof;

FIG. 3 is a right front perspective view thereof; and,

FIG. 4 is a left rear perspective view thereof.

The broken line illustration of a riding lawnmower in FIG. 4 is for illustrative purposes only and forms no part of the invention. 

The ornamental design for a storage bin for a riding lawnmower, as shown and described. 